Home / 3,936.32-5,431.68-2,167.80

Finding the Fourth Proportional to 3,936.32, 5,431.68 and 2,167.80

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Solution

The fourth proportional to 3,936.32, 5,431.68 and 2,167.80 is: 2,991.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.32 : 5,431.68 = 2,167.80 : x
  2. Step 2: Convert to fraction form
    3,936.32/5,431.68 = 2,167.80/x
  3. Step 3: Cross multiply
    3,936.32x = 5,431.68 × 2,167.80
  4. Step 4: Simplify right side
    3,936.32x = 11,774,795.90
  5. Step 5: Solve for x
    x = 11,774,795.90/3,936.32
  6. Step 6: Final answer
    x = 2,991.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.